109775421 has 12 divisors (see below), whose sum is σ = 181216672. Its totient is φ = 62728776.

The previous prime is 109775399. The next prime is 109775423. The reversal of 109775421 is 124577901.

It is a happy number.

109775421 is a `hidden beast` number, since 109 + 7 + 7 + 542 + 1 = 666.

It is not a de Polignac number, because 109775421 - 2⁶ = 109775357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109775423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871171 + ... + 871296.

Almost surely, 2^109775421 is an apocalyptic number.

It is an amenable number.

109775421 is a deficient number, since it is larger than the sum of its proper divisors (71441251).

109775421 is a wasteful number, since it uses less digits than its factorization.

109775421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742480 (or 1742477 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 109775421 is about 10477.3766277633. The cubic root of 109775421 is about 478.8156870969.

The spelling of 109775421 in words is "one hundred nine million, seven hundred seventy-five thousand, four hundred twenty-one".